Vehicle Backup Control Resolving Driver Intent vs Safety
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Solution Overview
Problem
Existing vehicle backup systems overly rely on braking controls, failing to respond to driver intentions to accelerate towards obstacles and causing unnecessary deceleration, leading to driver dependence on the system.
Innovation Solution
A travel support apparatus with a rear sensor and rear contact prevention device that performs first travel control by applying speed limitation or deceleration without driver operation, then reduces the operation amount through second travel control, allowing the vehicle to restart backing up and respond to driver acceleration requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system applies brake control every time a collision possibility is detected, then contact with obstacles is prevented, but the driver becomes overly reliant on the apparatus and cannot respond to situations where acceleration is desired
Solution Approach 1:
The system dynamically adjusts the level of intervention based on driver input. When the accelerator pedal is detected as operated, the system transitions from active brake control to a state that reduces operation amounts, allowing the vehicle to accelerate toward the obstacle. This dynamic response enables the system to adapt between safety-critical mode and driver-intention-accommodating mode.
Solution Approach 2:
The system changes the control parameter from full brake application to reduced operation amount based on accelerator pedal detection. This parameter change allows the vehicle to transition from deceleration to acceleration toward the obstacle when the driver intends to do so, resolving the contradiction between automatic safety control and driver autonomy.
2Reliability
If the system continuously decelerates the vehicle in relation to the obstacle, then contact is prevented, but the driver's ability to accelerate the vehicle when needed is restricted
Solution Approach 1:
The system continuously monitors accelerator pedal operation as feedback from the driver. When acceleration input is detected, the system responds by reducing the brake operation amount, allowing the vehicle to accelerate toward the obstacle. This feedback mechanism ensures the driver maintains control freedom while the system provides safety support.
Solution Approach 2:
The control system dynamically adjusts between deceleration and acceleration modes based on real-time driver input. The system does not maintain continuous deceleration but rather adapts its control action, reducing operation amounts when the driver accelerates, thereby preserving driver control freedom while maintaining contact prevention capability.
3Reliability
If the system performs strong deceleration control, then obstacle contact is avoided, but the driver may rely too much on the travel support apparatus
Solution Approach 1:
The system dynamically adjusts its control strength based on driver input rather than maintaining constant strong deceleration. When the accelerator pedal is operated, the system reduces operation amounts, allowing the vehicle to accelerate toward the obstacle. This dynamic behavior prevents over-reliance by showing the driver that the system responds to and respects driver intentions.
Solution Approach 2:
The system changes the control parameter from strong deceleration to reduced operation amount based on accelerator detection. This parameter change demonstrates to the driver that the system is a supportive assistant rather than an overriding controller, maintaining driver independence while ensuring safety through conditional intervention.
Data Source
AI summary
A travel support apparatus includes: a rear sensor that detects an obstacle behind a vehicle; and a rear contact prevention device that controls travel of the vehicle to prevent contact between the vehicle and the obstacle detected by the rear sensor as the vehicle backs up. The rear contact prevention device prevents contact between the vehicle and the obstacle detected by the rear sensor as the vehicle backs up, by performing first travel control to apply at least one of speed limitation and deceleration to the vehicle, without requiring an operation performed by a driver of the vehicle, and then performs second travel control to reduce an operation amount set in the first travel control.